Z-test on 52 sample to determine p-value and validate conclusion

Please see the paper enclosed. Perform a Z -test on a 52 sample class (26 samples in the paper + 26 samples in the 2nd attachment), and determine the p-value to validate the conclusion (decision).

Please perform all the calculations similar to how it was done in the paper meaning not just giving me the result number but showing all the calculations step by step as I am trying to understand the whole thing.

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"Thanks for your fast response! That follows a lot with what I was thinking. There is still an argument made by a friend of mine for the number 9 that he swears is the only correct answer by using an "invisible multiplier"."